CN114198023A - Screw rod direction regulator for hydraulic continuous oil pipe drilling - Google Patents
Screw rod direction regulator for hydraulic continuous oil pipe drilling Download PDFInfo
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- CN114198023A CN114198023A CN202210140377.1A CN202210140377A CN114198023A CN 114198023 A CN114198023 A CN 114198023A CN 202210140377 A CN202210140377 A CN 202210140377A CN 114198023 A CN114198023 A CN 114198023A
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- hydraulic
- pressure
- cabin
- bearing
- drill collar
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
Abstract
The invention relates to the technical field of drilling tools, in particular to a screw rod direction regulator for drilling of a hydraulic continuous oil pipe, which comprises an upper drill collar, a middle drill collar and a lower connector which are sequentially connected, wherein flow channels of mud are arranged in the upper drill collar and the middle drill collar, a pressure-bearing sealed cabin, a high-pressure isolated cabin and a hydraulic oil cabin which are sequentially connected are arranged in the upper drill collar, the high-pressure isolated cabin forms isolation limit on hydraulic oil in the hydraulic oil cabin to prevent the hydraulic oil from flowing into the pressure-bearing sealed cabin, a control circuit is arranged in the pressure-bearing sealed cabin, a balance piston, a hydraulic assembly, a speed reducer, an output shaft and a detection mechanism are sequentially arranged in the hydraulic oil cabin from top to bottom, the hydraulic assembly and the speed reducer are electrically connected with the control circuit, and a transmission auxiliary rotating component is arranged in the middle drill collar. The invention can solve the technical problems of poor orientation precision, incapability of continuous orientation, incapability of composite drilling, incapability of monitoring the tool surface in real time and incapability of monitoring the overload of a non-hydraulic mode cable control motor of a mechanical direction regulator.
Description
Technical Field
The invention relates to the technical field of drilling tools, in particular to a screw rod direction regulator for hydraulic continuous oil pipe drilling.
Background
Currently, the existing drilling techniques are: the drilling machine is used for drilling, churn drilling, coiled tubing drilling and the like, and compared with the conventional drilling machine, the coiled tubing drilling has the advantages that 1, the pressure control capability is strong, and the drilling can be safely and efficiently carried out under the underbalance condition. 2. The coiled tubing is suitable for deepening well drilling and sidetrack drilling operation of the existing well, and compared with the conventional well drilling equipment or well repairing equipment which achieves the same aim, the coiled tubing can save the cost by 25-40%. 3. The automation level of the drilling process is easily improved, and the number of operators is small. 4. The equipment has good maneuverability, easy installation and disassembly and time saving. 5. The drilling tool has the advantages of quick tripping and drilling, and short drilling operation period. 6. The ground equipment occupies less land and is suitable for the operation of the regions with limited ground conditions or offshore platforms. 7. The coiled tubing has good flexibility and can drill a horizontal well with a short bending radius. 8. The floor equipment is few, the noise is low, the dirt overflow amount is little, and the influence on the environment is little.
As shown in fig. 1, the conventional coiled tubing drilling tool assembly comprises a release device, mwd (lwd), jar, direction regulator, and screw, and can provide rock breaking power for downhole operations, adjust tool face of the drilling tool, and measure engineering parameters. The direction regulator is one of the core tools for the continuous pipe directional drilling, and the downhole screw tool surface is regulated by the direction regulator in the drilling process to reach required engineering parameters, so that the track of a well hole is controlled.
The continuous pipe direction regulator is divided into a cable-free direction regulator and a cable direction regulator through a power source and a data transmission mode of the continuous pipe direction regulator. The direction regulator is simple in structure and low in cost, but has long direction regulation period and low precision, and is easily influenced by the type of drilling fluid; the cable type direction regulator is divided into an electric-hydraulic direction regulator and an electric-control direction regulator, the direction regulator has high orientation precision and high data transmission speed, the electric-control direction regulator has a simpler structure and lower cost, but the tool surface is difficult to measure, and the motor is easily influenced by a load (a screw), once the motor is burnt out due to drill holding, the motor is completely driven by the motor during composite drilling to continuously rotate, so that faults are easily caused; the internal pressure and the external pressure are unbalanced, and the torque loss is large in the torque transmission process; the hydraulic direction regulator belongs to an electric hydraulic direction regulator, works through a hydraulic device, and a motor is not influenced by a screw rod.
Disclosure of Invention
In view of the above, the present invention provides a screw direction regulator for hydraulic coiled tubing drilling, so as to solve the problem that the existing direction regulator cannot monitor the tool surface of the screw in real time and cannot perform precise adjustment.
Based on the above purpose, the invention provides a screw rod direction regulator for drilling a hydraulic continuous oil pipe, which comprises an upper drill collar, a middle drill collar and a lower joint which are connected in sequence, wherein a flow channel of slurry is arranged in the upper drill collar and the middle drill collar, a pressure-bearing sealed cabin, a high-pressure isolated cabin and a hydraulic oil cabin which are connected in sequence are arranged in the upper drill collar, the high-pressure isolated cabin forms isolation limit on hydraulic oil in the hydraulic oil cabin to prevent the hydraulic oil from flowing into the pressure-bearing sealed cabin, a control circuit is arranged in the pressure-bearing sealed cabin, a balance piston, a hydraulic assembly, a speed reducer, an output shaft arranged at the output end of the speed reducer and a detection mechanism which is arranged on the output shaft and used for measuring the tool face angle of the screw rod are sequentially arranged in the hydraulic oil cabin from top to bottom, the hydraulic assembly and the speed reducer are both electrically connected with the control circuit, the output end of the output shaft penetrates through a plugging structure at the lower end of the hydraulic oil cabin and extends into the middle drill collar, and a transmission auxiliary rotating assembly which is used for being in transmission connection with the output end of the output shaft and the input end of the lower joint and assisting the lower joint in rotating is arranged in the middle drill collar.
Preferably, the hydraulic assembly is including locating high-speed electric machine, gear pump, first high pressure fuel pipe, tee bend, pressure limiting valve, second high pressure fuel pipe and the hydraulic motor in the hydraulic oil cabin, high-speed electric machine's output and gear pump are connected, the gear pump passes through first high pressure fuel pipe and three-way first interface connection, the hydraulic motor passes through second high pressure fuel pipe and three-way second interface connection, the pressure limiting valve is installed on three-way third interface, the hydraulic motor passes through the meshing ware and is connected with the input of speed reducer, control circuit is connected with the high-speed electric machine electricity.
Preferably, the hydraulic assembly further comprises an assembly shell arranged in the hydraulic oil cabin, the high-speed motor, the gear pump, the first high-pressure oil pipe, the tee joint, the pressure limiting valve and the second high-pressure oil pipe are all arranged in the assembly shell, and an upper cover is arranged at one end, facing the balance piston, of the assembly shell.
Preferably, the speed reducer is a planetary speed reducer, has the characteristics of stable operation and large reduction ratio, can achieve the purpose through first-stage speed reduction, and controls the rotating speed to be 1rpm/min after speed reduction.
Preferably, the upper end of hydraulic oil cabin is equipped with the mud mouth, the one end that the mud mouth was kept away from to balanced piston is equipped with the spring, and the one end and the upper cover that balanced piston was kept away from to the spring are connected, and balanced piston is balanced with the mud pressure phase with the hydraulic oil pressure that the regulation is located balanced piston both sides through the back and forth movement in the hydraulic oil cabin. The spring is preferably a tension spring, so that the hydraulic oil in the hydraulic oil tank is always filled in the oil tank.
In an alternative embodiment, the balance piston divides the inner cavity of the hydraulic oil tank into a slurry cavity and a hydraulic oil cavity, and the slurry port is communicated with the slurry cavity on the side of the balance piston, which faces away from the hydraulic assembly.
Preferably, a conduit is further arranged in the hydraulic oil cabin, two ends of the conduit are respectively communicated with the high-pressure isolation cabin and the upper cover, and the upper cover is provided with a sealing structure capable of penetrating through a wire.
Preferably, the conduit pipe penetrates through a central hole of the balance piston, and sealing rings are arranged among the conduit pipe, the high-pressure isolation cabin and the balance piston.
Preferably, a circuit bin, a center joint and a connector are arranged in the pressure-bearing sealed cabin, the center joint and the connector are respectively arranged at two ends of the circuit bin, the control circuit is arranged in the circuit bin, the center joint is electrically connected with the control circuit, and the high-speed motor and the detection mechanism are both connected with the connector. The center sub connects to a hard link of the mwd (lwd) at the upper end or a stinger cap connection from the coiled tubing.
Preferably, a pressure-bearing sealing seat is arranged in the high-pressure isolation cabin, a sealing ring and a sealing seat are arranged on the pressure-bearing sealing seat, and a first oil injection nozzle is arranged on the side wall of the high-pressure isolation cabin.
Preferably, the plugging structure is an anti-rotation plug, the output end of the output shaft penetrates through the anti-rotation plug and is connected with the transmission auxiliary rotation assembly, the detection mechanism comprises a tool surface sensor arranged between the speed reducer and the anti-rotation plug, a first one-way bearing is further arranged between the speed reducer and the anti-rotation plug, and the first one-way bearing is sleeved on the output shaft.
In an alternative embodiment, the connection between the anti-rotation plug and the hydraulic oil tank is connected by a first anti-rotation pin.
As an optional implementation form, the transmission auxiliary rotation assembly comprises a transmission shaft, a shaft sleeve and a bearing set which is arranged on the inner side of the lower end of the middle drill collar and externally sleeved with the upper cylindrical surface of the lower joint, the output end of the output shaft is connected with the input end of the transmission shaft through the shaft sleeve, and the output end of the transmission shaft is connected with the upper end of the lower joint.
Preferably, the direction regulator is still including installing in the lower clutch upper end and locating first thrust bearing locking Assembly and the second thrust bearing locking Assembly at bearing group both ends respectively, first thrust bearing locking Assembly includes first thrust bearing and lock nut, second thrust bearing locking Assembly includes second thrust bearing and locking cap, the output of transmission shaft is through the upper end locking connection of first thrust bearing and lock nut with the lower clutch, bearing group and second thrust bearing lock through the locking cap and seal, bearing group is one-way bearing and ball bearing group.
As an optional implementation form, a clearance channel for slurry to flow is reserved between the upper drill collar and the pressure-bearing sealed cabin, and water holes for slurry to pass through are formed in the middle drill collar and the lower joint.
In an alternative embodiment, the connection ends of the upper drill collar and the middle drill collar are connected by a second anti-rotation pin.
The invention has the beneficial effects that:
1. according to the invention, through the combination of the hydraulic assembly and the speed reducing mechanism and the matching of the detection mechanism arranged on the output shaft, the real-time monitoring of the tool surface of the screw can be realized, and the real-time and accurate adjustment of the direction regulator can be conveniently realized. The upper drill collar and the middle drill collar are installation shells of the internal mechanism of the direction regulator, and are used for bearing transmission torque and drilling pressure, isolating internal high-pressure slurry and annular slurry, and the middle drill collar is also used as a protective sleeve of the transmission auxiliary rotating assembly and plays a role in fixing the transmission auxiliary rotating assembly and connecting a lower joint. The invention can solve the technical problems that the mechanical direction regulator in the prior art has poor orientation precision, can not be continuously oriented, can not be compositely drilled, can not monitor the tool surface in real time and can not monitor the overload of the non-hydraulic mode cable control motor.
2. A high-speed motor, a gear pump, a first high-pressure oil pipe, a tee joint, a pressure limiting valve and a second high-pressure oil pipe in the hydraulic assembly are all arranged in an assembly shell to play a role in protection. A pressure limiting valve is arranged on the tee joint, high-pressure oil drives the hydraulic motor to work, if the load is blocked and overload is generated, overhigh oil pressure overflows through the pressure limiting valve, the safety of the system is ensured, and the high-speed motor and the hydraulic motor are also prevented from being damaged.
3. A spring is arranged at one end of the balance piston, which is far away from the slurry port, and the spring adopts a tension spring to ensure that the hydraulic oil in the balance piston is always filled in the oil bin; the balance piston is used for balancing internal and external pressure, so that the pressure of the internal hydraulic oil is always the same as that of slurry, and the pressure at two ends of the output shaft is balanced; on can guaranteeing that output torque is complete to be used the lower clutch, when the hydraulic oil full storehouse of hydraulic tank, the balanced piston top to the head (the topmost of sight window), when lack of oil, the balanced piston hides inside the sight window and can't see.
4. The detection mechanism adopts a tool face sensor to measure the tool face angle of the screw rod at any time; two one-way bearings are provided next to the tool face sensor to act to center the output shaft and prevent the output shaft from reversing. And the output torque is not lost due to the balance of the internal pressure and the external pressure of the hydraulic oil cabin. Under the action of the hydraulic motor, the output shaft continuously rotates to perform composite drilling, so that the inclination stabilizing effect is achieved.
5. And the thrust bearing is arranged on the upper part of the lower joint to offset the thrust of a longitudinal drilling tool, the one-way bearing, the ball bearing set and the thrust bearing are arranged on the cylindrical surface on the upper part of the lower joint, and the bearing set and the thrust bearing are locked and sealed through the locking cap. The bearing group has the function of righting the lower joint to enable the lower joint to rotate flexibly and prevent the lower joint from reversing, and the locking cap has the function of locking the whole bearing group and the lower joint.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a portion of the upper drill collar of FIG. 1;
FIG. 3 is a schematic view of a connection between the upper drill collar and the middle drill collar of FIG. 1;
FIG. 4 is a partial schematic view of the connection of the middle and lower drill collars of FIG. 1;
fig. 5 is a flow chart of the operation of the present invention.
Labeled as:
1. a center joint; 2. a pressure-bearing sealed cabin; 3. a control circuit; 4. an upper drill collar; 5. a seal ring; 6. a pressure-bearing seal seat; 7. a first oil nozzle; 8. a high pressure isolation capsule; 9. a slurry port; 10. a balance piston; 11. a spring; 12. a conduit; 13. an upper cover; 14. an assembly housing; 15. a high-speed motor; 16. a gear pump; 17. a first high pressure fuel line; 18. a pressure limiting valve; 19. a tee joint; 20. a second high pressure fuel line; 21. a hydraulic motor; 22. a clutch; 23. a speed reducer; 24. a tool face sensor; 25. a first one-way bearing; 26. a second one-way bearing; 27. a hydraulic oil tank; 28. an anti-rotation plug; 29. a second oil injection nozzle; 30. a first anti-rotation pin; 31. a shaft sleeve; 32. an output shaft; 33. a second anti-rotation pin; 34. a drive shaft; 35. a middle drill collar; 36. a first thrust bearing; 37. locking the nut; 38. a one-way bearing and a ball bearing set; 39. a second thrust bearing; 40. a locking cap; 41. and a lower joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present invention, the upper and lower means that the entire instrument cluster is vertically arranged, the upward direction is the upper direction, the downward direction is the lower direction, and the inner and outer means that the instrument cluster body is used as a boundary, the diameter is smaller than the surface of the instrument body, the inner is the inner, and the diameter is larger than or equal to the surface of the instrument body, the outer is the outer.
As shown in fig. 1, 2, 3 and 4, a screw rod direction regulator for drilling of a hydraulic continuous oil pipe comprises an upper drill collar 4, a middle drill collar 35 and a lower joint 41 which are connected in sequence, a flow channel of mud is arranged in the upper drill collar 4 and the middle drill collar 35, a pressure-bearing sealed cabin 2, a high-pressure isolated cabin 8 and a hydraulic oil cabin 27 which are connected in sequence are arranged in the upper drill collar 4, the high-pressure isolated cabin 8 forms an isolation limit for hydraulic oil in the hydraulic oil cabin 27 to prevent the hydraulic oil from flowing into the pressure-bearing sealed cabin 2, a control circuit 3 is arranged in the pressure-bearing sealed cabin 2, a balance piston 10, a hydraulic assembly, a speed reducer 23, an output shaft 32 arranged at the output end of the speed reducer 23 and a detection mechanism which is arranged on the output shaft 32 and is used for measuring the face angle of the screw rod are arranged in the hydraulic oil cabin 27 from top to bottom in sequence, the hydraulic assembly and the speed reducer 23 are both electrically connected with the control circuit 3, the output end of the output shaft 32 penetrates through the blocking structure at the lower end of the hydraulic oil tank 27 and extends into the middle drill collar 35, and a transmission auxiliary rotating assembly which is used for being in transmission connection with the output end of the output shaft 32 and the input end of the lower connector 41 and assisting in rotating the lower connector 41 is arranged in the middle drill collar 35. In this transfer to ware, through the combination of hydraulic pressure assembly with speed reducer 23 to and the detection mechanism who sets up on the cooperation output shaft 32, can carry out real time monitoring to the screw rod instrument face, be convenient for realize transferring to real-time accurate regulation of ware. And the lower joint 41 is connected with the single-bending screw rod, so that coiled tubing drilling can be realized. The upper drill collar 4 and the middle drill collar 35 are installation shells of the internal mechanism of the direction regulator, and are used for bearing transmission torque and drilling pressure and isolating internal high-pressure slurry and annular slurry, and the middle drill collar 35 is also a protective sleeve of the transmission auxiliary rotating assembly and plays a role in fixing the transmission auxiliary rotating assembly and connecting the lower joint 41.
As shown in fig. 2 and 3, the hydraulic assembly includes a high-speed motor 15, a gear pump 16, a first high-pressure oil pipe 17, a tee joint 19, a pressure limiting valve 18, a second high-pressure oil pipe 20 and a hydraulic motor 21, which are arranged in a hydraulic oil tank 27, an output end of the high-speed motor 15 is connected with the gear pump 16, the gear pump 16 is connected with a first interface of the tee joint 19 through the first high-pressure oil pipe 17, the hydraulic motor 21 is connected with a second interface of the tee joint 19 through the second high-pressure oil pipe 20, the pressure limiting valve 18 is installed on a third interface of the tee joint 19, the hydraulic motor 21 is connected with an input end of a speed reducer 23 through a gear 22, and the control circuit 3 is electrically connected with the high-speed motor 15. A pressure limiting valve 18 is arranged on the tee joint 19, high-pressure oil drives the hydraulic motor 21 to work, if the load is blocked and overload is generated, overhigh oil pressure overflows through the pressure limiting valve 18, the safety of the system is ensured, and the high-speed motor 15 and the hydraulic motor 21 are also ensured not to be damaged.
As shown in figure 1, a circuit cabin and a center joint 1 and a connector which are respectively arranged at two ends of the circuit cabin are arranged in a pressure-bearing sealed cabin 2, a control circuit 3 is arranged in the circuit cabin, the center joint 1 is electrically connected with the control circuit 3, and a high-speed motor 15 and a detection mechanism are both connected with the connector. The circuit cabin is arranged to protect the control circuit 3, and the central joint 1 is connected with a hard link (not shown) of MWD (logging while drilling) at the upper end (LWD) or a releaser cap from a coiled tubing to connect a power supply and a signal into the diverter. The lower end of the circuit cabin is provided with a connector (not shown in the figure) which can be connected with the high-speed motor 15 and the detection mechanism in the hydraulic oil tank 27. In the invention, a control circuit 3 is connected with a central joint 1 and inputs the cable voltage and control signals of upper end MWD (LWD) into a circuit cabin; the circuit of the circuit bin controls the operation of the high-speed motor 15 and drives the gear pump 16 (high-pressure pump) to work to generate high-pressure liquid flow, the hydraulic motor 21 is connected with the gear pump 16 through a high-pressure oil pipeline, the high-pressure liquid flow drives the hydraulic motor 21 to rotate, and the output of the hydraulic motor 21 is decelerated through the speed reducer 23 and output to the output shaft 32 at the lower end.
As shown in fig. 1 and 2, a pressure-bearing seal seat 6 is arranged in the high-pressure isolation cabin 8, a seal ring 5 and a seal seat are arranged on the pressure-bearing seal seat 6, and a first oil injection nozzle 7 is arranged on the side wall of the high-pressure isolation cabin 8. Specifically, the upper end of the high-pressure isolation cabin 8 is connected with the pressure-bearing sealed cabin 2, and the lower end is connected with the hydraulic oil cabin 27; a pressure-bearing sealing seat 6 is arranged in the high-pressure isolation cabin 8, a sealing ring 5 and a sealing plug are arranged on the pressure-bearing sealing seat 6, hydraulic oil of the hydraulic oil cabin 27 is isolated, and stable and reliable operation of a circuit is guaranteed. The high-pressure isolation chamber 8 is provided with a first oil injection nozzle 7, and when vacuum pumping and oil injection are needed, vacuum pumping and oil injection are carried out from the first oil injection nozzle 7.
As shown in fig. 3, the hydraulic assembly further includes an assembly housing 14 disposed in the hydraulic oil tank 27, the high-speed motor 15, the gear pump 16, the first high-pressure oil pipe 17, the tee joint 19, the pressure limiting valve 18, and the second high-pressure oil pipe 20 are all disposed in the assembly housing 14, and an upper cover 13 is disposed at an end of the assembly housing 14 facing the balance piston 10. A high-speed motor 15, a gear pump 16, a first high-pressure oil pipe 17, a tee joint 19, a pressure limiting valve 18 and a second high-pressure oil pipe 20 in the hydraulic assembly are all arranged in an assembly shell 14 to play a role in protection.
In this embodiment, the speed reducer 23 is preferably a planetary speed reducer 23, and has the characteristics of smooth operation and large reduction ratio, and the purpose can be achieved through one-stage speed reduction, and the rotating speed is controlled to be 1rpm/min after speed reduction. The speed reducer 23 is disposed in the hydraulic oil tank 27 near a lower portion in the hydraulic oil tank 27.
Further, as shown in fig. 2, a slurry port 9 is provided at the upper end of the hydraulic oil tank 27, a spring 11 is provided at the end of the balance piston 10 away from the slurry port 9, the end of the spring 11 away from the balance piston 10 is connected to the upper cover 13, and the balance piston 10 moves back and forth in the hydraulic oil tank 27 to adjust the pressure of the hydraulic oil at both sides of the balance piston 10 to be balanced with the slurry pressure. The spring 11 is preferably a tension spring, ensuring that the hydraulic oil inside the hydraulic tank 27 is always filled with hydraulic oil (no vacuum block). The balance piston 10 is used for balancing internal pressure and external pressure, so that the pressure of the internal hydraulic oil is always the same as that of the slurry, and the pressures at two ends of the output shaft 32 are balanced; it is ensured that the output torque is fully applied to the lower joint 41, when the hydraulic oil in the hydraulic oil tank 27 is full, the balance piston 10 is pushed to the head (the uppermost end of the sight window), and when the oil is short, the balance piston 10 is hidden inside the sight window and cannot be seen.
As an alternative embodiment, the balance piston 10 divides the inner cavity of the hydraulic oil tank 27 into a slurry cavity and a hydraulic oil cavity, and the slurry port 9 communicates with the slurry cavity on the side of the balance piston 10 facing away from the hydraulic assembly.
As shown in fig. 2 and 3, a conduit 12 is further disposed in the hydraulic oil tank 27, two ends of the conduit 12 are respectively communicated with the high-pressure isolation tank 8 and the upper cover 13, and the upper cover 13 is provided with a sealing structure capable of passing through a conductor. The sealing arrangement may be implemented as a sealing plug or the like in order to prevent hydraulic oil from flowing into the conduit 12. The conduit 12 acts as a routing conduit providing a safe path for the conductors while isolating the slurry from the hydraulic fluid. Preferably, the conduit 12 penetrates through the central hole of the balance piston 10, and the seal rings 5 are arranged between the conduit 12 and the high-pressure isolation chamber 8 and between the conduit 12 and the balance piston 10, so as to ensure the sealing connection effect.
As shown in fig. 1 and 3, the blocking structure is an anti-rotation plug 28, the output end of the output shaft 32 penetrates through the anti-rotation plug 28 and is connected with the transmission auxiliary rotation assembly, the detection mechanism includes a tool surface sensor 24 disposed between the speed reducer 23 and the anti-rotation plug 28, a first one-way bearing 25 is further disposed between the speed reducer 23 and the anti-rotation plug 28, and the first one-way bearing 25 is sleeved on the output shaft 32. Furthermore, a second one-way bearing 26 is disposed between the first one-way bearing 25 and the anti-rotation plug 28, and the second one-way bearing 26 is sleeved on the output shaft 32. Two one-way bearings are provided next to the tool face sensor 24 to act to center the output shaft 32 and prevent the output shaft 32 from rotating in reverse. Since the internal and external pressures of the hydraulic oil tank 27 are balanced, the output torque is not lost. Under the action of the hydraulic motor 21, the output shaft 32 continuously rotates to perform composite drilling, so that the inclination stabilization effect is achieved.
As shown in fig. 3, the connection between the anti-rotation plug 28 and the hydraulic tank 27 is connected by a first anti-rotation pin 30. The effects of preventing rotation and improving connection stability are achieved. The anti-rotation plug 28 is provided with a second oil injection nozzle 29, and when oil injection is required, oil is injected from the second oil injection nozzle 29.
As shown in fig. 1 and 4, the transmission auxiliary assembly includes a transmission shaft 34, a shaft sleeve 31, and a bearing set disposed inside the lower end of the middle drill collar 35 and externally sleeved with the upper cylindrical surface of the lower joint 41, an output end of the output shaft 32 is connected with an input end of the transmission shaft 34 through the shaft sleeve 31, and an output end of the transmission shaft 34 is connected with the upper end of the lower joint 41. The output shaft 32 is a round shaft made of high strength metal.
Preferably, the screw direction regulator further comprises a first thrust bearing locking assembly and a second thrust bearing locking assembly which are installed at the upper end of the lower joint 41 and are respectively arranged at two ends of the bearing set, the first thrust bearing locking assembly comprises a first thrust bearing 36 and a locking nut 37, the second thrust bearing locking assembly comprises a second thrust bearing 39 and a locking cap 40, the output end of the transmission shaft 34 is in locking connection with the upper end of the lower joint 41 through the first thrust bearing 36 and the locking nut 37, the bearing set and the second thrust bearing 39 are locked and sealed through the locking cap 40, and the bearing set is a one-way bearing and a ball bearing set 38. The upper part of the lower joint 41 is provided with a first thrust bearing 36 for counteracting the longitudinal drill thrust, the cylindrical surface of the upper part of the lower joint 41 is provided with a one-way bearing and ball bearing group 38 and a second thrust bearing 39, and the one-way bearing and ball bearing group 38 and the second thrust bearing 39 are locked and sealed through a locking cap 40. The bearing assembly has the function of righting the lower joint 41 to enable the lower joint 41 to rotate flexibly and prevent the lower joint 41 from reversing, and the locking cap 40 has the function of locking the whole bearing assembly and the lower joint 41.
As an alternative embodiment, as shown in FIG. 3, the connection ends of the upper drill collar 4 and the middle drill collar 35 are connected by a second anti-rotation pin 33. The effects of preventing rotation and improving connection stability are achieved.
As an optional implementation form, a clearance channel for slurry to flow is reserved between the upper drill collar 4 and the pressure-bearing sealed cabin 2, and water holes for slurry to pass through are formed in the middle drill collar 35 and the lower joint 41, so that the slurry can smoothly pass through the water holes.
As shown in fig. 5, the working flow of the hydraulic screw direction regulator for coiled tubing drilling is as follows: the ground issues instructions, and when the composite drilling is carried out, the direction regulator continuously rotates, and the continuous drilling is carried out in a composite mode; if the composite drilling cannot be carried out, the data collected by the tool surface sensor 24 is read, the angle difference is calculated, the rotating angle of the steering gear is adjusted, and when the data collected by the tool surface sensor 24 accords with the preset correct data, continuous drilling is carried out in the directional mode.
By adopting the direction regulator for hydraulic coiled tubing drilling provided by the embodiment, the combination of the hydraulic assembly and the speed reducer 23 can be used for accurately regulating the screw tool face in real time, the directional precision is high, the data transmission speed block can be used for directional drilling and composite drilling, the drilling speed is greatly accelerated, and the application cost is low.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to those examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A screw rod direction regulator for hydraulic continuous oil pipe drilling comprises an upper drill collar (4), a middle drill collar (35) and a lower connector (41) which are sequentially connected, wherein a flow channel of slurry is arranged in the upper drill collar (4) and the middle drill collar (35), and the screw rod direction regulator is characterized in that a pressure-bearing sealed cabin (2), a high-pressure isolation cabin (8) and a hydraulic oil cabin (27) which are sequentially connected are arranged in the upper drill collar (4), the high-pressure isolation cabin (8) forms isolation limit on hydraulic oil in the hydraulic oil cabin (27) to prevent the hydraulic oil from flowing into the pressure-bearing sealed cabin (2), a control circuit (3) is arranged in the pressure-bearing sealed cabin (2), a balance piston (10), a hydraulic assembly, a speed reducer (23), an output shaft (32) arranged at the output end of the speed reducer (23) and a detection mechanism which is arranged on the output shaft (32) from top to bottom and is used for measuring the tool face angle of a screw rod are sequentially arranged in the hydraulic oil cabin (27), the hydraulic assembly and the speed reducer (23) are electrically connected with the control circuit (3), the output end of the output shaft (32) penetrates through the sealing structure at the lower end of the hydraulic oil tank (27) and extends into the middle drill collar (35), and a transmission auxiliary rotating component which is used for being in transmission connection with the output end of the output shaft (32) and the input end of the lower joint (41) and is used for rotating the lower joint (41) is arranged in the middle drill collar (35).
2. The hydraulic coiled tubing drilling screw direction adjuster according to claim 1, the hydraulic assembly comprises a high-speed motor (15), a gear pump (16), a first high-pressure oil pipe (17), a tee joint (19), a pressure limiting valve (18), a second high-pressure oil pipe (20) and a hydraulic motor (21) which are arranged in a hydraulic oil tank (27), the output end of the high-speed motor (15) is connected with a gear pump (16), the gear pump (16) is connected with a first interface of a tee joint (19) through a first high-pressure oil pipe (17), the hydraulic motor (21) is connected with a second interface of the tee joint (19) through a second high-pressure oil pipe (20), the pressure limiting valve (18) is installed on a third interface of the tee joint (19), the hydraulic motor (21) is connected with the input end of the speed reducer (23) through the meshing device (22), and the control circuit (3) is electrically connected with the high-speed motor (15).
3. The hydraulic screw rod direction regulator for coiled tubing drilling according to claim 2, wherein the hydraulic assembly further comprises an assembly housing (14) arranged in a hydraulic oil tank (27), the high-speed motor (15), the gear pump (16), the first high-pressure oil pipe (17), the tee joint (19), the pressure limiting valve (18) and the second high-pressure oil pipe (20) are all arranged in the assembly housing (14), and an upper cover (13) is arranged at one end of the assembly housing (14) facing the balance piston (10).
4. The screw rod direction regulator for hydraulic continuous oil pipe drilling according to claim 3, characterized in that a conduit (12) is further arranged in the hydraulic oil tank (27), two ends of the conduit (12) are respectively communicated with the high-pressure isolation tank (8) and the upper cover (13), and the upper cover (13) is provided with a sealing structure capable of passing through a wire.
5. The screw rod direction regulator for hydraulic continuous oil pipe drilling according to claim 3, characterized in that the upper end of the hydraulic oil tank (27) is provided with a mud port (9), the end of the balance piston (10) far away from the mud port (9) is provided with a spring (11), the end of the spring (11) far away from the balance piston (10) is connected with the upper cover (13), and the balance piston (10) is moved back and forth in the hydraulic oil tank (27) to adjust the hydraulic oil pressure on the two sides of the balance piston (10) to be balanced with the mud pressure.
6. The screw rod direction regulator for hydraulic coiled tubing drilling according to claim 2, wherein a circuit cabin and a center joint (1) and a connector which are respectively arranged at two ends of the circuit cabin are arranged in the pressure-bearing sealed cabin (2), the control circuit (3) is arranged in the circuit cabin, the center joint (1) is electrically connected with the control circuit (3), and the high-speed motor (15) and the detection mechanism are both connected with the connector; the high-pressure isolation cabin is characterized in that a pressure-bearing sealing seat (6) is arranged in the high-pressure isolation cabin (8), a sealing ring (5) and a sealing seat are arranged on the pressure-bearing sealing seat (6), and a first oil injection nozzle (7) is arranged on the side wall of the high-pressure isolation cabin (8).
7. The screw rod direction regulator for hydraulic coiled tubing drilling according to claim 1, wherein the blocking structure is an anti-rotation plug (28), the output end of the output shaft (32) penetrates through the anti-rotation plug (28) to be connected with the transmission auxiliary rotation component, the detection mechanism comprises a tool face sensor (24) arranged between the speed reducer (23) and the anti-rotation plug (28), a first one-way bearing (25) is further arranged between the speed reducer (23) and the anti-rotation plug (28), and the first one-way bearing (25) is sleeved on the output shaft (32).
8. The hydraulic screw rod direction regulator for continuous oil pipe drilling according to claim 1, wherein the transmission auxiliary rotating assembly comprises a transmission shaft (34), a shaft sleeve (31) and a bearing set which is arranged on the inner side of the lower end of the middle drill collar (35) and externally sleeved with the upper cylindrical surface of the lower joint (41), the output end of the output shaft (32) is connected with the input end of the transmission shaft (34) through the shaft sleeve (31), and the output end of the transmission shaft (34) is connected with the upper end of the lower joint (41).
9. The screw rod direction regulator for hydraulic continuous oil pipe drilling is characterized in that the direction regulator further comprises a first thrust bearing locking assembly and a second thrust bearing locking assembly which are arranged at the upper end of the lower joint (41) and are respectively arranged at two ends of the bearing group, the first thrust bearing locking assembly comprises a first thrust bearing (36) and a locking nut (37), the second thrust bearing locking assembly comprises a second thrust bearing (39) and a locking cap (40), the output end of the transmission shaft (34) is in locking connection with the upper end of the lower joint (41) through the first thrust bearing (36) and the locking nut (37), the bearing group and the second thrust bearing (39) are in locking sealing through the locking cap (40), and the bearing group is a one-way bearing and a ball bearing group (38).
10. The screw rod direction regulator for hydraulic coiled tubing drilling according to claim 1, characterized in that a clearance channel for slurry to flow is reserved between the upper drill collar (4) and the pressure-bearing sealed cabin (2), and water holes for slurry to pass through are arranged in the middle drill collar (35) and the lower joint (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210140377.1A CN114198023B (en) | 2022-02-16 | 2022-02-16 | Screw rod direction regulator for hydraulic continuous oil pipe drilling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210140377.1A CN114198023B (en) | 2022-02-16 | 2022-02-16 | Screw rod direction regulator for hydraulic continuous oil pipe drilling |
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| CN114198023A true CN114198023A (en) | 2022-03-18 |
| CN114198023B CN114198023B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210140377.1A Active CN114198023B (en) | 2022-02-16 | 2022-02-16 | Screw rod direction regulator for hydraulic continuous oil pipe drilling |
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| CA2529921A1 (en) * | 2005-12-13 | 2007-06-13 | Foremost Industries Inc. | Coiled tubing injector system |
| CN102086755A (en) * | 2010-12-22 | 2011-06-08 | 中国石油集团长城钻探工程有限公司 | Guiding high-pressure jet drilling system based on coiled tubing |
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| CN214091710U (en) * | 2020-10-30 | 2021-08-31 | 中国石油天然气集团有限公司 | Continuous oil pipe drilling director |
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|---|---|
| CN114198023B (en) | 2022-04-15 |
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